1 files changed, 71 insertions, 0 deletions
diff --git a/sql/tztime.h b/sql/tztime.h
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+++ b/sql/tztime.h
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+/* Copyright (C) 2004 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+
+#ifdef __GNUC__
+#pragma interface			/* gcc class interface */
+#endif
+
+#if !defined(TESTTIME) && !defined(TZINFO2SQL)
+/*
+  This class represents abstract time zone and provides 
+  basic interface for TIME <-> my_time_t conversion.
+  Actual time zones which are specified by DB, or via offset 
+  or use system functions are its descendants.
+*/
+class Time_zone: public Sql_alloc 
+{
+public:
+  /*
+    Converts local time in broken down TIME representation to 
+    my_time_t (UTC seconds since Epoch) represenation.
+    Returns 0 in case of error. Sets in_dst_time_gap to true if date provided
+    falls into spring time-gap (or lefts it untouched otherwise).
+  */
+  virtual my_time_t TIME_to_gmt_sec(const TIME *t, 
+                                    bool *in_dst_time_gap) const = 0;
+  /*
+    Converts time in my_time_t representation to local time in
+    broken down TIME representation.
+  */
+  virtual void   gmt_sec_to_TIME(TIME *tmp, my_time_t t) const = 0;
+  /*
+    Because of constness of String returned by get_name() time zone name 
+    have to be already zeroended to be able to use String::ptr() instead
+    of c_ptr().
+  */
+  virtual const String * get_name() const = 0;
+
+  /* 
+    We need this only for surpressing warnings, objects of this type are
+    allocated on MEM_ROOT and should not require destruction.
+  */
+  virtual ~Time_zone() {};
+};
+
+extern Time_zone * my_tz_UTC;
+extern Time_zone * my_tz_SYSTEM;
+extern Time_zone * my_tz_find(THD *thd, const String *name);
+extern my_bool     my_tz_init(THD *org_thd, const char *default_tzname, my_bool bootstrap);
+extern void        my_tz_free();
+
+/* 
+  Maximum length of time zone name that we support 
+  (Time zone name is char(64) in db)
+*/
+#define MAX_TIME_ZONE_NAME_LENGTH 72
+
+#endif /* !defined(TESTTIME) && !defined(TZINFO2SQL) */